AGX-3/4 Equivalent & Substitute Parts Reference

Part Overview

The AGX-3/4 is a fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division, rated for 750 mA at 250 V AC/DC. This component is designed for use in applications requiring overcurrent protection in electrical circuits. The fuse operates in the 8AG form factor (1/4" x 1") and requires a compatible holder for installation. The part maintains Active product status and is available in bulk packaging with 1075 units currently in stock. Substitute parts are identified when electrical and mechanical parameters align with the original specification, ensuring functional equivalence in circuit protection applications.

Substiute Parts

AGX-3/4

Eaton - Electronics DivisionIn Stock: 1146AGX-3/4 Datasheet

Current PartRFQ

BK/AGX-3/4

Eaton - Electronics DivisionIn Stock: 817BK/AGX-3/4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AGX-3/4 are identified based on strict electrical and mechanical parameter alignment. The following criteria determine substitution eligibility:

Critical Parameters for Substitution:

• Current Rating: 750 mA (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 8AG, 1/4" x 1" (exact match required)
• Size / Dimension: 0.250" Dia x 1.000" L (exact match required)
• Breaking Capacity @ Rated Voltage: 35A (exact match required)
• DC Cold Resistance: 0.215 Ohms (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Approval Agency: cULus (exact match required)

The substitute part BK/AGX-3/4 meets all critical electrical and mechanical parameters, confirming functional equivalence for direct replacement in circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

Both the AGX-3/4 and BK/AGX-3/4 are Active products manufactured by Eaton - Electronics Division and carry cULus approval certification. The parts are electrically and mechanically identical across all specified parameters, including current rating, voltage rating, response time, physical dimensions, breaking capacity, and DC cold resistance.

Selection between these parts should be based on inventory availability and procurement requirements. The AGX-3/4 has 1075 units in stock, while the BK/AGX-3/4 has 766 units available. Both parts comply with the same regulatory framework and are suitable for direct substitution in 750 mA, 250 V AC/DC fast-blow fuse applications requiring 8AG form factor compatibility.

Frequently Asked Questions (FAQ)

Q: Can BK/AGX-3/4 be used as a direct replacement for AGX-3/4?

A: Yes. The BK/AGX-3/4 meets all electrical and mechanical specifications of the AGX-3/4, including current rating (750 mA), voltage rating (250 V AC), response time (Fast Blow), package format (8AG, 1/4" x 1"), breaking capacity (35A), and DC cold resistance (0.215 Ohms). Both parts carry identical cULus approval and are manufactured by Eaton - Electronics Division.

Q: What does the "BK/" prefix indicate in the part number BK/AGX-3/4?

A: The prefix difference between AGX-3/4 and BK/AGX-3/4 does not affect electrical or mechanical performance. Both parts are functionally equivalent based on the provided specifications.

Q: Are there any compatibility issues with fuse holders?

A: Both parts require a compatible 8AG fuse holder for installation. The physical dimensions (0.250" Dia x 1.000" L) are identical, ensuring compatibility with any holder designed for the 8AG form factor.

Q: What is the significance of the 35A breaking capacity?

A: The 35A breaking capacity at rated voltage (250 V) indicates the maximum fault current the fuse can safely interrupt. This specification is identical for both the AGX-3/4 and BK/AGX-3/4.

Q: Do both parts have the same DC cold resistance?

A: Yes. Both the AGX-3/4 and BK/AGX-3/4 have a DC cold resistance of 0.215 Ohms, ensuring identical electrical performance in circuit applications.

Q: Which part should be selected based on availability?

A: Selection should be based on procurement lead time and inventory requirements. The AGX-3/4 has higher current stock (1075 units) compared to BK/AGX-3/4 (766 units). Both are Active products with equivalent specifications.